you need to work on your lighting, depth, contrast and such more. You have the basic concept down, as well as the creativity. If you practice on what ive told you, you have potential to create wonderful pieces. As of now its a 6/10, if you can adjust those flaws, it can very possibly be a 10/10.

edit:

I just realized the text, and ew. You never ever want to just slap on text, alot of the time that is what makes or breaks the sig. I usually spend just as much time on the text as i do creating the actual design. That has to be fixed as well.

its pretty cool not bad i say 7/10